108 Needham New Genera and Species of Perlidae. 



stigma. The branches of vein Cuj in the fore wing are attached to its 

 anterior side. 



The larvae, found among dead leaves in a spring-fed brook, are of very 

 unusual appearance ; short and thick, with unusually short and close-ringed 

 antennae and setae; thorax highly and smoothly arched, its thin and 

 flaring margins overlapping the very few and very thick, single gill 

 filaments. 



Peltoperla arcuata sp. nov. 



Length of body, 10 mm. ; length to wing tips, 18 mm. ; expanse of wings, 

 34 mm. 



A long winged perlid with short and flat body ; head distinctly narrower 

 than the prothorax, and retracted under its front margin. The two ocelli 

 equidistant from each other and from the eyes ; antennae long and slend 

 erly tapering, pale brown ; disc yellowish, minutely pilose. 



Prothoracic disc with its thin, projecting edges slightly upturned before 

 and behind, its front margin straight, its hind margin very convex, its 

 front angles very slightly and its hind angles very broadly rounded, and 

 its sides parallel. Color pale brown, yellowish around the hind margin 

 and along the middle line ; there are a few broad, irregular and indistinct 

 corrugations upon the disc. 



Mesothorax pale brown. Wings nearly uniform brownish hyaline, the 

 veins slightly darker ; legs pale yellowish brown slightly darker at the 

 joints; their bases separated by very broad sterna. The metathoracic 

 sternum broadly overlaps the first abdominal segment and is emarginate 

 in the middle of its hind margin. 



Abdomen yellowish, each segment with an obscure brown basal band on 

 the dorsal side, continued below on segments 8 and 9 ; segment 10 yellow ; 

 setae yellow, short, hairy, hardly longer than segments 9 and 10 together 

 and greatly surpassed by the wing tips. The sternum of the 8th segment 

 (female) is produced backward nearly to the tip of the 9th segment in a 

 very broadly rounded lobe. 



The genus Perlinella (type Perla elongata Wa,\sh=Perlatrivittntta Banks) 

 is somewhat like Peltoperla in the distribution of branches on the cubital 

 vein. 



Neoperla nom. riov. 



Type. Perla occipitalis Pictet. 



Replacing Pseudoperla Banks, Trans. Amer. Ent. Soc., vol. 19, p. 342, pre 

 occupied by Pictet in Orthoptera. 



A number of specimens of both sexes of the little known Pcrla 

 cyrene Newman from New Zealand, kindly sent me by Messrs. 

 G. Howes, of Dunedin, and G. V. Hudson, of Wellington, and 

 by Mr. Arthur M. Lea, of Hobart, Tasmania, have enabled 

 me to study this interesting species. Mr. Hudson, in his ex- 



